Dear juliana
One thing is: perform a spin-polarized calculation and another thing is: obtain a band stricture for particular path across brillouin zone. For the first case is necesarily the SpinPolarized flag, as you mentioned. But in order to obtain the band structure you need to set another flag: %block BandLines (see userguide). Then with the help of the veiga's program you'll be able to process the raw case.bands file obtained by siesta and get the band structure for up and dn channels separately.
Best regards
Ricardo

--------------------------------------------
Dr. Ricardo Faccio
Prof. Adj. de Física

Av. Gral. Flores 2124. CC 1157. CP 11800.
Phone: + 598 2 924 9859
Fax: + 598 2 924 1906
Web: http://cryssmat.fq.edu.uy/ricardo/ricardo.htm
---------------------------------------------

El 25/01/2009, a las 14:10, Juliana Morbec <jmor...@yahoo.com.br> escribió:

Hi Roberto,

thanks for your help.
But, can I obtain spin-polarized band structure just using

        SpinPolarized          True

in file.fdf or I have to use another flags?

Thanks in advance,

Juliana Morbec


De: Roberto Veiga <roberto.ve...@ymail.com>
Para: SIESTA-L@listserv.uam.es
Enviadas: Domingo, 25 de Janeiro de 2009 8:57:04
Assunto: Re: [SIESTA-L] Spin-polarized band structure

Hi, Juliana,

you can find attached a slightly modified version of the program gnubands. It generates two files, bands-up.dat and bands-down.dat.

Best regards,

Roberto

From: Juliana Morbec <jmor...@yahoo.com.br>
To: SIESTA-L@listserv.uam.es
Sent: Sunday, January 25, 2009 2:13:09 AM
Subject: [SIESTA-L] Spin-polarized band structure

Dear SIESTA users.

I need to do the spin-polarized band structure of a material. Please, how could I obtain bands of spin-up channel?
I guess that I have to use

FixSpin         True
TotalSpin      0.5

but I don't know if this is correct.
And if I want to obtain bands of spin-down channel?

Regards,

Juliana Morbec



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